/*
* jQuery SimpleTree Drag&Drop plugin
* Update on 22th May 2008
* Version 0.3
*
* Licensed under BSD <http://en.wikipedia.org/wiki/BSD_License>
* Copyright (c) 2008, Peter Panov <panov@elcat.kg>, IKEEN Group http://www.ikeen.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of the Peter Panov, IKEEN Group nor the
*       names of its contributors may be used to endorse or promote products
*       derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Peter Panov, IKEEN Group ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Peter Panov, IKEEN Group BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/


$.fn.simpleTree = function(opt){
    return this.each(function(){
        var TREE = this;
        var ROOT = $('.root',this);
        var mousePressed = false;
        var mouseMoved = false;
        var dragMoveType = false;
        var dragNode_destination = false;
        var dragNode_source = false;
        var dragDropTimer = false;
        var ajaxCache = Array();

        TREE.option = {
            drag:        true,
            animate:    false,
            autoclose:    false,
            speed:        'fast',
            afterAjax:    false,
            afterMove:    false,
            afterClick:    false,
            afterDblClick:    false,
            // added by Erik Dohmen (2BinBusiness.nl) to make context menu cliks available
            afterContextMenu:    false,
            docToFolderConvert:false,
            treePlusPath:  '',
            treeSpacerPath:  '',
            treeMinusPath:  ''
        };
        TREE.option = $.extend(TREE.option,opt);
        $.extend(this, {getSelected: function(){
            return $('span.active', this).parent();
        }});
        TREE.closeNearby = function(obj)
        {
            $(obj).siblings().filter('.folder-open, .folder-open-last').each(function(){
                var childUl = $('>ul',this);
                var className = this.className;
                this.className = className.replace('open','close');
                if(TREE.option.animate)
                {
                    childUl.animate({height:"toggle"},TREE.option.speed);
                }else{
                    childUl.hide();
                }
            });
        };
        TREE.nodeToggle = function(obj)
        {
            var childUl = $('>ul',obj);
            if(childUl.is(':visible')){
                obj.className = obj.className.replace('open','close');

                if(TREE.option.animate)
                {
                    childUl.animate({height:"toggle"},TREE.option.speed);
                }else{
                    childUl.hide();
                }
            }else{
                obj.className = obj.className.replace('close','open');
                if(TREE.option.animate)
                {
                    childUl.animate({height:"toggle"},TREE.option.speed, function(){
                        if(TREE.option.autoclose)TREE.closeNearby(obj);
                        if(childUl.is('.ajax'))TREE.setAjaxNodes(childUl, obj.id);
                    });
                }else{
                    childUl.show();
                    if(TREE.option.autoclose)TREE.closeNearby(obj);
                    if(childUl.is('.ajax'))TREE.setAjaxNodes(childUl, obj.id);
                }
            }
        };
        TREE.setAjaxNodes = function(node, parentId, callback)
        {
            if($.inArray(parentId,ajaxCache) == -1){
                ajaxCache[ajaxCache.length]=parentId;
                var url = $.trim($('>li', node).text());
                if(url && url.indexOf('url:'))
                {
                    url=$.trim(url.replace(/.*\{url:(.*)\}/i ,'$1'));
                    $.ajax({
                        type: "GET",
                        url: url,
                        contentType:'html',
                        cache:false,
                        success: function(responce){
                            node.removeAttr('class');
                            node.html(responce);
                            $.extend(node,{url:url});
                            TREE.setTreeNodes(node, true);
                            if(typeof TREE.option.afterAjax == 'function')
                            {
                                TREE.option.afterAjax(node);
                            }
                            if(typeof callback == 'function')
                            {
                                callback(node);
                            }
                        }
                    });
                }
                
            }
        };
        TREE.setTreeNodes = function(obj, useParent){
            obj = useParent? obj.parent():obj;
            $('li>span', obj).addClass('text')
            .bind('selectstart', function() {
                return false;
            }).click(function(){
                $('.active',TREE).removeClass('active');
                if(this.className.indexOf('active') == -1)
                {
                    $(this).addClass('active');
                }
                if(typeof TREE.option.afterClick == 'function')
                {
                    TREE.option.afterClick($(this).parent());
                }
                return false;
            }).dblclick(function(){
                mousePressed = false;
                TREE.nodeToggle($(this).parent().get(0));
                if(typeof TREE.option.afterDblClick == 'function')
                {
                    TREE.option.afterDblClick($(this).parent());
                }
                return false;
                // added by Erik Dohmen (2BinBusiness.nl) to make context menu actions
                // available
            }).bind("contextmenu",function(){
                $('.active',TREE).removeClass('active');
                if(this.className.indexOf('active') == -1)
                {
                    $(this).addClass('active');
                }
                if(typeof TREE.option.afterContextMenu == 'function')
                {
                    TREE.option.afterContextMenu($(this).parent());
                }
                return false;
            }).mousedown(function(event){
                mousePressed = true;
                cloneNode = $(this).parent().clone();
                var LI = $(this).parent();
                if(TREE.option.drag)
                {
                    $('>ul', cloneNode).hide();
                    $('body').append('<div id="drag_container"><ul></ul></div>');
                    $('#drag_container').hide().css({opacity:'0.8'});
                    $('#drag_container >ul').append(cloneNode);
                    $("<img>").attr({id    : "tree_plus",src    : TREE.option.treePlusPath}).css({width: "7px",display: "block",position: "absolute",left    : "5px",top: "5px", display:'none'}).appendTo("body");
                    $(document).bind("mousemove", {LI:LI}, TREE.dragStart).bind("mouseup",TREE.dragEnd);
                }
                return false;
            }).mouseup(function(){
                if(mousePressed && mouseMoved && dragNode_source)
                {
                    TREE.moveNodeToFolder($(this).parent());
                }
                TREE.eventDestroy();
            });
            $('li', obj).each(function(i){
                var className = this.className;
                var open = false;
                var cloneNode=false;
                var LI = this;
                var childNode = $('>ul',this);
                if(childNode.size()>0){
                    var setClassName = 'folder-';
                    if(className && className.indexOf('open')>=0){
                        setClassName=setClassName+'open';
                        open=true;
                    }else{
                        setClassName=setClassName+'close';
                    }
                    this.className = setClassName + ($(this).is(':last-child')? '-last':'');

                    if(!open || className.indexOf('ajax')>=0)childNode.hide();

                    TREE.setTrigger(this);
                }else{
                    var setClassName = 'doc';
                    this.className = setClassName + ($(this).is(':last-child')? '-last':'');
                }
            }).before('<li class="line">&nbsp;</li>')
            .filter(':last-child').after('<li class="line-last"></li>');
            TREE.setEventLine($('.line, .line-last', obj));
        };
        TREE.setTrigger = function(node){
            $('>span',node).before('<img class="trigger" src="' + TREE.option.treeSpacerPath + '" border=0>');
            var trigger = $('>.trigger', node);
            trigger.click(function(event){
                TREE.nodeToggle(node);
            });
            if(!$.browser.msie)
            {
                trigger.css('float','left');
            }
        };
        TREE.dragStart = function(event){
            var LI = $(event.data.LI);
            if(mousePressed)
            {
                mouseMoved = true;
                if(dragDropTimer) clearTimeout(dragDropTimer);
                if($('#drag_container:not(:visible)')){
                    $('#drag_container').show();
                    LI.prev('.line').hide();
                    dragNode_source = LI;
                }
                $('#drag_container').css({position:'absolute', "left" : (event.pageX + 5), "top": (event.pageY + 15) });
                if(LI.is(':visible'))LI.hide();
                var temp_move = false;
                if(event.target.tagName.toLowerCase()=='span' && (event.target.className.indexOf('text') != -1 || event.target.className.indexOf('active') != -1 || event.target.className.indexOf('trigger') != -1))
                {
                    var parent = event.target.parentNode;
                    var offs = $(parent).offset();
                    var screenScroll = {x : (offs.left - 3),y : event.pageY - offs.top};
                    var isrc = $("#tree_plus").attr('src');
                    var ajaxChildSize = $('>ul.ajax',parent).size();
                    var ajaxChild = $('>ul.ajax',parent);
                    screenScroll.x += 19;
                    screenScroll.y = event.pageY - screenScroll.y + 5;

                    if(parent.className.indexOf('folder-close')>=0 && ajaxChildSize==0)
                    {
                        if(isrc.indexOf('minus')!=-1)$("#tree_plus").attr('src',TREE.option.treePlusPath);
                        $("#tree_plus").css({"left": screenScroll.x, "top": screenScroll.y}).show();
                        dragDropTimer = setTimeout(function(){
                            parent.className = parent.className.replace('close','open');
                            $('>ul',parent).show();
                        }, 700);
                    }else if(parent.className.indexOf('folder')>=0 && ajaxChildSize==0){
                        if(isrc.indexOf('minus')!=-1)$("#tree_plus").attr('src',TREE.option.treePlusPath);
                        $("#tree_plus").css({"left": screenScroll.x, "top": screenScroll.y}).show();
                    }else if(parent.className.indexOf('folder-close')>=0 && ajaxChildSize>0)
                    {
                        mouseMoved = false;
                        $("#tree_plus").attr('src',TREE.option.treeMinusPath);
                        $("#tree_plus").css({"left": screenScroll.x, "top": screenScroll.y}).show();

                        $('>ul',parent).show();
                        /*
                            Thanks for the idea of Erik Dohmen
                        */
                        TREE.setAjaxNodes(ajaxChild,parent.id, function(){
                            parent.className = parent.className.replace('close','open');
                            mouseMoved = true;
                            $("#tree_plus").attr('src',TREE.option.treePlusPath);
                            $("#tree_plus").css({"left": screenScroll.x, "top": screenScroll.y}).show();
                        });

                    }else{
                        if(TREE.option.docToFolderConvert)
                        {
                            $("#tree_plus").css({"left": screenScroll.x, "top": screenScroll.y}).show();
                        }else{
                            $("#tree_plus").hide();
                        }
                    }
                }else{
                    $("#tree_plus").hide();
                }
                return false;
            }
            return true;
        };
        TREE.dragEnd = function(){
            if(dragDropTimer) clearTimeout(dragDropTimer);
            TREE.eventDestroy();
        };
        TREE.setEventLine = function(obj){
            obj.mouseover(function(){
                if(this.className.indexOf('over')<0 && mousePressed && mouseMoved)
                {
                    this.className = this.className.replace('line','line-over');
                }
            }).mouseout(function(){
                if(this.className.indexOf('over')>=0)
                {
                    this.className = this.className.replace('-over','');
                }
            }).mouseup(function(){
                if(mousePressed && dragNode_source && mouseMoved)
                {
                    dragNode_destination = $(this).parents('li:first');
                    TREE.moveNodeToLine(this);
                    TREE.eventDestroy();
                }
            });
        };
        TREE.checkNodeIsLast = function(node)
        {
            if(node.className.indexOf('last')>=0)
            {
                var prev_source = dragNode_source.prev().prev();
                if(prev_source.size()>0)
                {
                    prev_source[0].className+='-last';
                }
                node.className = node.className.replace('-last','');
            }
        };
        TREE.checkLineIsLast = function(line)
        {
            if(line.className.indexOf('last')>=0)
            {
                var prev = $(line).prev();
                if(prev.size()>0)
                {
                    prev[0].className = prev[0].className.replace('-last','');
                }
                dragNode_source[0].className+='-last';
            }
        };
        TREE.eventDestroy = function()
        {
            // added by Erik Dohmen (2BinBusiness.nl), the unbind mousemove TREE.dragStart action
            // like this other mousemove actions binded through other actions ain't removed (use it myself
            // to determine location for context menu)
            $(document).unbind('mousemove',TREE.dragStart).unbind('mouseup').unbind('mousedown');
            $('#drag_container, #tree_plus').remove();
            if(dragNode_source)
            {
                $(dragNode_source).show().prev('.line').show();
            }
            dragNode_destination = dragNode_source = mousePressed = mouseMoved = false;
            //ajaxCache = Array();
        };
        TREE.convertToFolder = function(node){
            node[0].className = node[0].className.replace('doc','folder-open');
            node.append('<ul><li class="line-last"></li></ul>');
            TREE.setTrigger(node[0]);
            TREE.setEventLine($('.line, .line-last', node));
        };
        TREE.convertToDoc = function(node){
            $('>ul', node).remove();
            $('img', node).remove();
            node[0].className = node[0].className.replace(/folder-(open|close)/gi , 'doc');
        };
        TREE.moveNodeToFolder = function(node)
        {
            if(!TREE.option.docToFolderConvert && node[0].className.indexOf('doc')!=-1)
            {
                return true;
            }else if(TREE.option.docToFolderConvert && node[0].className.indexOf('doc')!=-1){
                TREE.convertToFolder(node);
            }
            TREE.checkNodeIsLast(dragNode_source[0]);
            var lastLine = $('>ul >.line-last', node);
            if(lastLine.size()>0)
            {
                TREE.moveNodeToLine(lastLine[0]);
            }
        };
        TREE.moveNodeToLine = function(node){
            TREE.checkNodeIsLast(dragNode_source[0]);
            TREE.checkLineIsLast(node);
            var parent = $(dragNode_source).parents('li:first');
            var line = $(dragNode_source).prev('.line');
            $(node).before(dragNode_source);
            $(dragNode_source).before(line);
            node.className = node.className.replace('-over','');
            var nodeSize = $('>ul >li', parent).not('.line, .line-last').filter(':visible').size();
            if(TREE.option.docToFolderConvert && nodeSize==0)
            {
                TREE.convertToDoc(parent);
            }else if(nodeSize==0)
            {
                parent[0].className=parent[0].className.replace('open','close');
                $('>ul',parent).hide();
            }

            // added by Erik Dohmen (2BinBusiness.nl) select node
            if($('span:first',dragNode_source).attr('class').indexOf('text') >= 0)
            {
                $('.active',TREE).addClass('text');
                $('.active',TREE).removeClass('active');
                $('span:first',dragNode_source).addClass('class','active');
            }

            if(typeof(TREE.option.afterMove) == 'function')
            {
                var pos = $(dragNode_source).prevAll(':not(.line)').size();
                TREE.option.afterMove($(node).parents('li:first'), $(dragNode_source), pos);
            }
        };

        TREE.addNode = function(id, text, callback)
        {
            var temp_node = $('<li><ul><li id="'+id+'"><span>'+text+'</span></li></ul></li>');
            TREE.setTreeNodes(temp_node);
            dragNode_destination = TREE.getSelected();
            dragNode_source = $('.doc-last',temp_node);
            TREE.moveNodeToFolder(dragNode_destination);
            temp_node.remove();
            if(typeof(callback) == 'function')
            {
                callback(dragNode_destination, dragNode_source);
            }
        };
        TREE.delNode = function(callback)
        {
            dragNode_source = TREE.getSelected();
            TREE.checkNodeIsLast(dragNode_source[0]);
            dragNode_source.prev().remove();
            dragNode_source.remove();
            if(typeof(callback) == 'function')
            {
                callback(dragNode_destination);
            }
        };

        TREE.init = function(obj)
        {
            TREE.setTreeNodes(obj, false);
        };
        TREE.init(ROOT);
    });
}